While she met QueenElizabeth in April 2009, Mrs. Obama has yet to meet the royal couple. She did pass on her congratulations to William and Kate via an interview with BarbaraWalters. "Congratulations and, hopefully, you will be as happy, as happily married as Barack and I," she said in an interview last November.

American presidents have traditionally been invited to royal weddings. The Reagans were invited to the 1981 wedding of William's parents, PrinceCharles and PrincessDiana, and NancyReagan attended on behalf of the president.